}

        final BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
        final String minimumShouldMatch = fessConfig.getQueryBoolMinimumShouldMatch();
        if (StringUtil.isNotBlank(minimumShouldMatch)) {
            boolQuery.minimumShouldMatch(minimumShouldMatch);
        }
        return new DefaultQueryBuilder(boolQuery);
    }